[R] How to add grid lines at specific position to a plot?
sarah.goslee at gmail.com
Thu Mar 15 18:30:14 CET 2012
On Thu, Mar 15, 2012 at 1:05 PM, Michael <comtech.usa at gmail.com> wrote:
> How to add grid lines at specific position to a plot?
> Hi all,
> [Disclaimer: I have done extensive and intensive searching on Google and
> asked around but couldn't find a solution to this problem.
> Please help me instead of just pointing out how simple and stupid my
> question is. God bless good folks! Thanks!]
> This is a headache for me and I have been struggling with this for a while.
> With an existing plot, how can I add a horizontal grid line at vertical
> location 0 (just need 1 grid line)...
> I can certainly draw such a line myself using "lines".
> However, that will impact my legends because that also counts as a line.
> But we wouldn't want a grid line to be counted as a line...
> Could anybody please help me?
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